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Table 1 Key MRI findings for the diagnosis of localized disorders of the fasciae

From: Fasciae of the musculoskeletal system: MRI findings in trauma, infection and neoplastic diseases


Key MRI findings

Morel-Lavallée lesion

• Fusiform or ovoid fluid collection

• Located at the interface between the hypodermic fat and the deep peripheral fascia

Myofascial and myotendinous injuries

• Loss of the normal organization of the muscles and fasciae with abnormal heterogenous intermediate signal intensity

• Inconstant collections of fluid and/or blood

• Located at the interface between the muscle and the epimysium (myofascial injuries) and the interface between the muscle and the tendon (myotendinous injuries)

Muscle hernia

• Focal bulging of the muscle tissue out of the muscle compartment into the hypodermic fat

• Interruption of the deep peripheral fascia is inconstantly observed

Non-necrotizing and necrotizing cellulitis

• Infiltration of the hypodermis with fluid-signal intensity and enhancement after contrast material injection

• May be associated with collections and lack of enhancement of the hypodermis due to poor vascularization and/or necrosis (necrotizing cellulitis)

Necrotizing fasciitis

• Thickening of the deep fasciae with high signal intensity on fluid-sensitive sequences and heterogeneous enhancement after contrast material injection

• Low signal intensity areas visible on all sequences suggestive of gas (highly specific but not sensitive)

• Extensive thickening of the intermuscular fasciae with an appearance suggesting incomplete vascularization supports the diagnosis

Palmar fibromatosis

• Nodules in continuity with the palmar aponeurosis

• Diagnosis is usually clinical

Plantar fibromatosis

• Nodule in continuity with the plantar aponeurosis

• May be multiple and bilateral